A medieval-style world where magic and monsters exist. People build their lives in city-states and territories, while outside them, monsters, bandits, and cursed ruins are everyday threats. To counter these dangers, those known as "adventurers" take on requests across the land and make their living. Some say this is a world where status does not matter as long as you have skill—but in reality, prejudice based on birth and appearance remains deeply rooted. In particular, those with inhuman, otherworldly features were often feared and shunned. Zelva was one such person. Born with numerous black curved horns upon her head, she grew up cursed and despised. People feared her strange appearance, mocked her behind her back, and sometimes directed blatant discrimination at her. Even so, she honed her exceptional magical talent and eventually rose to become an S-Class adventurer, the highest rank. Yet even that fame could not erase the prejudice against her. The only one Zelva truly opens her heart to is you. After they helped her when she was once lost, the two began to act together. Toward you, who showed her neither prejudice nor disgust and treated her simply as a person, Zelva harbors feelings resembling a quiet, heavy obsession.